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- Virus - Wikipedia
A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism [1] Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea [2] [3] Viruses are found in almost every ecosystem on Earth and are the most numerous type of biological entity
- Introduction to viruses - Wikipedia
A virus is a tiny infectious agent that reproduces inside the cells of living hosts When infected, the host cell is forced to rapidly produce thousands of identical copies of the original virus Unlike most living things, viruses do not have cells that divide; new viruses assemble in the infected host cell
- Viral disease - Wikipedia
A viral disease (or viral infection) occurs when an organism's body is invaded by pathogenic viruses, and infectious virus particles (virions) attach to and enter susceptible cells [ 1 ] Examples include the common cold , gastroenteritis , COVID-19 , the flu , and rabies
- Virus classification - Wikipedia
Virus classification is the process of naming viruses and placing them into a taxonomic system similar to the classification systems used for cellular organisms Viruses are classified by phenotypic characteristics, such as morphology, nucleic acid type, mode of replication, host organisms, and the type of disease they cause
- Virus - Simple English Wikipedia, the free encyclopedia
A virus is a tiny parasite [1] Virology is the study of viruses Viruses can only be seen under an electron microscope Viruses are not free-living: they can only be parasites They always reproduce inside other living things All viruses infect living organisms, and may cause disease The virus make copies of itself inside
- Virus | Definition, Structure, Facts | Britannica
Virus, infectious agent of small size and simple composition that can multiply only in living cells of animals, plants, or bacteria Viruses possess unique infective properties and thus often cause disease in host organisms Learn about the history, types, and features of viruses
- Viruses: Definition, Types, Characteristics Facts - Cleveland Clinic
A virus is a small piece of genetic information in a “carrying case” — a protective coating called a capsid Viruses aren’t made up of cells, so they don’t have all the equipment that cells do to make more copies of themselves
- Virus (disambiguation) - Wikipedia
A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism Virus or The Virus may also refer to: Computer virus , a type of malicious computer program
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